package com.itheima.filter;

import jakarta.servlet.*;
import jakarta.servlet.annotation.WebFilter;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;
@Slf4j
//@WebFilter(urlPatterns = "/*")//拦截所有请求
public class DemoFilter implements Filter {
    //初始化 web服务器启动时执行 且执行一次
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
       log.info("init初始化方法运行...");


    }
    //拦截到请求之后执行 会执行多次
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        log.info("拦截到了请求....放行前");
        //放行
        filterChain.doFilter(servletRequest,servletResponse);

        log.info("拦截到了请求....放行后");

    }
    //销毁的方法 web服务器关闭时执行 且执行一次
    @Override
    public void destroy() {
       log.info("destroy销毁的方法执行...");
    }
}
